Speed-indicator.



E. G. OLIVER.

SPEED INDICATOR.

APPLICATION FILED JULY 8,1907.

PATENTBD AUG. 11, 1908.

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SPEED-INDICATOR.

Specification of Letters Patent.

Patented Aug. 11, 1908.

Application filed July 8, 1907. Serial No. 382,681.

To all whom 'it may concern.-

Be it known that I, Em) CHARLES (haven, of Minneapolis, Hennepin county, Minnesota, have invented certain new and useful Improvements in Speed-Ind icators, of which the following is a specification.

. The object of my invention is to provide an indicator adapted to be connected with the moving part of an automobile or other mechanism for the purpose of indicating the speed of the moving part.

The invention consists generally in a centrallypivoted weight, a springa-dapted to swing on a different .center and connectedwith said weight and means for transmitting the movement of the 'weight'to an indicator.

In the accompanying drawings, forming part of this specification, Figure 1 is asectiona'l view of a speed indicator embodying my invention. Fig. 2 is a detail perspective view showing the position assumed by the parts when the device is in operation, the inclosing casing being removed.

In the drawing/2 represents a suitable casing wherein the operating mechanism is arranged.

3 is a vertical shaft connected by any suitable means, 'as a flexible shaft (not shown), with a wheel of the automobile or with the moving part of a piece of stationary machinery'to which the instrument may be at-' tached. This shaft 3 has a ball bearing 4 ateach end and a longitudinal slot 5. A ring 6 is centrally pivoted on the shaft 3 and normally stands at an acute angle with respect to the longitudinal axis of the shaft. The axis of the ring coincides with the center of cent-cu of mass ol" the l points of its movement at the center of rotation. When the shaft 1 is revolved the ring will be moved by ccnl tril'ugall'orceon its pivotand swing toward a horizontal position, as indicated in Fig. 2. An arm7is secured to the ring onone side and a staple 8 is mounted in the shal't 3 and coin nected with the arm 7 by a coiled spring 9. t The spring 9 swings on the staplers as a center when the ring 4 is oscillated but its length I is shorter than the radius of the ring, consequently the-distance between the lower end of the arm 7 and the staple 8 varies with the l movement of the ring 4 and the spring 9 will be put under tension as the ringswings down toward a horizontal position, and will be relieved as the. ring returns to its normal position] The longitudinal axis of the coiled l ring will remain at al spring il extended will intersect approxi mately the center ol the weight pivot when the weight is in its normal position. This construction enables inc-to obtain a more accurate zero point and a more sensitive and reliable indicator for low speeds. The tensionof the spring is illustrated in Fig. 2 where the ring is shown as moved from its normal position to a mint where the spring will be extended as the lower end ol the arm moves away from the spring pivot.

The opposite side of the ring is provided with a standard 10 having a curved surl'ace 11 formed on its up )er end. A pin 12 slidably arranged wi an arm 13 which projects through the slot 5 and bears on the surface ll. The movement ofthe pin 12 is transmitted through a mechanism 12 to an indicator hand 12 by means of which the speed of the machine or the moving part with which the spindle is connected, may be indicated. As the ring swings toward a horizontal position, the surface 11 will slide on the arm ll the pin .12 moving up or down to accommodate itsell' to the variation in the said surface. This instrument can be adjusted very easily. will be extremely sensitive and capable of indicating accurately both high and low speeds, and being composed of but low parts can be easily assembled and will be inexpensive to nmmil'acturc;

1 claim as my invention:

1. In a speed indicating dcvicc. the combinalion, with a rotating spindle. ol' a weight centrally pivoted thereon, a springconnected with said weight am dill cl'ent center, whereby it will be put under tension by the oscillation ol' said ring, the longitudinal axis of said springintersccting approximately when extended, the pivot ol said weight, when in the normal or zero position and a dial having an indicator hand and means for transmitting the movement ol'saidring to said hand.

2. in a speed indicating device, the combination, with a rotating spindle, of a weight [)lvolcd thereon, thc center oi mass coincident with the axis of rotation, and yielding means connected with said ring and arranged to swing therewith but on a different center and put-under tension by the movement. of said ring, the axis of said yielding means when-extended intersecting approximately "the pivot-of said ol' said weight being weight, when the device-is in its inoperatie t llll the shalt 2'; and has po ition, a. dial and an indicator hand therelot and a motion transmitting d viee eonn eting said ring with said indit'ator hand.

It. speed indieating device comprising a rotating spindle, a weight centrally pivoted thereon. a roiled spring eoi'inected at one end to said spindle and at itsot'her end to aid weight. the longitudinal axis of said pring interseetii'ig; approximately when extended, the pivot olf said weight when the derice is in its inoperative position and said spring swinging on a shorter radius than said neig'ht, whereby it will he put under tension when said weight moves toward a horizontal position, a, dial and indicator hand therel'or, and means lot transmitting the mo'ven'ient ol' said \t'eight to said hand.

t. in indicating device comprising a rotating spindle, a ring eentrally pivoted thereon, a coiled spring attached at one.end to said spindle, an arm mounted on said ring; and eonnected to the other end ol said spring, the longitudinal axis ol said spring coincids ing approximate-ti with the center ol the pivot of said weight when the device is in its inoperative position and the radius of said ring being greater than the length of said spring, ,'herel the oscillation of said ring toward a horizontal position will put. said spring under tension. a dial and indicator hand therefor, and means for transmitting themovement of said ring to said hand.

5. it speed indi ating; device comprising a rotating spindle, an oscillating weight centrall pivoted thereon, a spring device ar ranged to he put under tension by the movement ol said weight toward a hm'izontal position, av standard mounted on. said weight and having, a curved end surface and a pin slidahl mounted in said spindle and having an arm adapted to hear on said surface, an indieator hand and dial and means actuated by the movement of said pin for operating said hand.

ln witness whereof, I have hereunto set my hand this 2nd day olJuly 1907.

EDI) CHARLES OLIVER.

\Yitnesses: 

